LED scrolling message using ATmega32,dot matrix
hi
friends i have made a simple inexpensive(costing less than RS350) ...
LED scrolling message using
ATmega32,few transistors(2N2222),DOT matrix and breadboard to keep it simple
used WIN AVR C compiler and the coding goes like this
//sample code
#include <avr/io.h>
#define F_CPU 4000000UL
#include <util/delay.h>
typedef unsigned char u8;
typedef unsigned int u16;
int main(void)
{
u8 i,k;
u16 data[7]={1,2,4,8,16,32,64},da;
DDRA=255;//data O/p to dot matrix
DDRC=255; //control o/p to dot matrix
da=1 ;
while(1)
{
for(k=0;k<5;k++)
{
PORTA=da;
PORTC=data[k];
for(i=0;i<99;i++)
{
_delay_ms(10);
}
da++;
if(da>=65)
{
da=1;
}
}//end K
}// end while
}//end of program
and have used the same(hardware) to play PING PONG game on DOT matrix
check this link for visuals
http://www.youtube.com/watch?v=-U4E0WWZr9A
the position of right base and left base where the ball bounce's can be controlled
using 4 switches
when the base does not come in the path of ball(obstruct)
the game ends ....
we can see this as all the LEDs of that side/column glow as in vedio left side column glows
350 lines of C code without using a timer" for ping pong
Very good work natraja can you provide me the link for the hardware circuitry used by you..
i have used control pins to sink the current and data pins to source current
we can use the opp too .....
used 2N2222 to sink current ...... and use MCU pins directly to drive the LEDs when the matrix size increases this is not feasible
Link
http://lh6.ggpht.com/_r7fIqDBrkFA/SjHZ1OHUVxI/AAAAAAAAAGE/OZYG_NIsdpo/s5...
Ok thanks for that.. nice work done by you.. keep posting,.. Some of my works can be found at my blog.. http://robozeal.blogspot.com
Join their as a moderator if you are interested in robotics.
http://www.youtube.com/watch?v=ByHruA5CmD8&NR=1